Lighting device

Abstract

A lighting device may be provided that includes: a heat sink; a light source module which is disposed on the heat sink, includes a substrate having at least one hole, and includes a plurality of light emitting devices disposed on a top surface of the substrate; a power supply unit which is disposed within the heat sink and includes a support plate and a plurality of parts disposed on the support plate; and a soldering portion which connects the substrate and the support plate. The support plate includes an extended substrate which is disposed in the hole of the substrate. The extended substrate includes a through-portion which has passed through the hole of the substrate. The soldering portion electrically connects the through-portion of the extended substrate and the top surface of the substrate.

What is claimed is: 
     
       1. A lighting device comprising:
 a heat sink; 
 a light source module which is disposed on the heat sink, includes a substrate having at least one hole, and includes a plurality of light emitting devices disposed on a top surface of the substrate; 
 a power supply unit which is disposed within the heat sink and includes a support plate and a plurality of parts disposed on the support plate; and 
 a soldering portion which connects the substrate and the support plate, 
 wherein the support plate includes an extended substrate which is disposed in the hole of the substrate, 
 wherein the extended substrate includes a through-portion which has passed through the hole of the substrate, 
 wherein the soldering portion electrically connects the through-portion of the extended substrate and the top surface of the substrate, 
 wherein a length of the through-portion of the extended substrate is from 1.5 mm to 2.0 mm, 
 wherein the heat sink includes a receiver receiving the power supply unit, and a pair of a first guide and a second guide which are disposed within the receiver and guide sides of one edge of the support plate, and 
 wherein a distance between the first guide and the second guide is reduced toward a lower portion of the heat sink. 
 
     
     
       2. The lighting device of  claim 1 , wherein the through-portion of the extended substrate and the top surface of the substrate comprise a terminal respectively, and wherein the soldering portion is disposed between the terminal of the substrate and the terminal of the through-portion of the extended substrate. 
     
     
       3. The lighting device of  claim 1 , wherein, in the hole of the substrate, a distance between the substrate and the extended substrate is greater than 0 or less than 0.2 mm. 
     
     
       4. The lighting device of  claim 1 , wherein the heat sink comprises a first heat radiation part on which the light source module is disposed, and a second heat radiation part within which the power supply unit is disposed,
 wherein the second heat radiation part of the heat sink comprises an inner portion receiving the power supply unit, an outer portion enclosing the inner portion, and a first receiver disposed between the inner portion and the outer portion, and 
 wherein the first heat radiation part of the heat sink comprises an upper portion on which the substrate of the light source module is disposed, and a lower portion disposed in the first receiver of the second heat radiation part. 
 
     
     
       5. The lighting device of  claim 4 , wherein the first heat radiation part has a first thermal conductivity, wherein the second heat radiation part has a second thermal conductivity less than the first thermal conductivity, and wherein the first heat radiation part and the second heat radiation part are integrally formed with each other. 
     
     
       6. The lighting device of  claim 4 , wherein the upper portion of the first heat radiation part is disposed on the outer portion of the second heat radiation part, wherein a plurality of the upper portions of the first heat radiation part are provided, and wherein the plurality of the upper portions are disposed radially around the inner portion of the second heat radiation part. 
     
     
       7. The lighting device of  claim 4 , wherein the upper portion of the first heat radiation part is disposed on the inner portion of the second heat radiation part,
 wherein a plurality of lower portions of the second heat radiation part are provided, and 
 wherein shapes of the plurality of the lower portions correspond to an outer surface shape of the outer portion of the second heat radiation part, and are disposed adjacent to the outer surface of the outer portion of the second heat radiation part. 
 
     
     
       8. The lighting device of  claim 1 , further comprising a base which supplies external power to the power supply unit,
 wherein the heat sink includes a receiver receiving the power supply unit and includes a connection portion which is coupled to the base, 
 wherein the support plate of the power supply unit includes a protrusion, and 
 wherein the connection portion of the heat sink has a connection recess into which the protrusion of the support plate is inserted. 
 
     
     
       9. The lighting device of  claim 8 , wherein the protrusion is disposed in both corners of the lower portion of the support plate. 
     
     
       10. The lighting device of  claim 8 , wherein the protrusion has a hook shape. 
     
     
       11. The lighting device of  claim 8 , wherein the heat sink comprises a first heat radiation part on which the light source module is disposed, and a second heat radiation part having the receiver,
 wherein the second heat radiation part of the heat sink comprises an inner portion having the receiver, and an outer portion enclosing the inner portion, and 
 wherein the first heat radiation part of the heat sink comprises an upper portion on which the substrate of the light source module is disposed, and a lower portion disposed between the inner portion of the second heat radiation part and the outer portion of the second heat radiation part. 
 
     
     
       12. The lighting device of  claim 11 , wherein the first heat radiation part has a first thermal conductivity, wherein the second heat radiation part has a second thermal conductivity less than the first thermal conductivity, and wherein the first heat radiation part and the second heat radiation part are integrally formed with each other. 
     
     
       13. The lighting device of  claim 1 , wherein, in an entrance of the receiver of the heat sink, the interval between the first guide and the second guide is greater than a value obtained by adding 1 mm to a thickness of the support plate. 
     
     
       14. The lighting device of  claim 1 , wherein, in a bottom surface of the receiver of the heat sink, the interval between the first guide and the second guide is greater than a thickness of the support plate and less than a value obtained by adding 0.1 mm to the thickness connection recess disposed between the first guide and the second guide, and wherein the support plate has a protrusion which is inserted into the connection recess. 
     
     
       15. The lighting device of  claim 1 , further comprising a base which supplies external power to the power supply unit, wherein the heat sink further comprises a connection portion which is coupled to the base, wherein the connection portion of the heat sink has a connection recess disposed between the first guide and the second guide, and wherein the support plate has a protrusion which is inserted into the connection recess. 
     
     
       16. The lighting device of  claim 15 , wherein the protrusion is disposed in both corners of the lower portion of the support plate. 
     
     
       17. The lighting device of  claim 15 , wherein the protrusion has a hook shape. 
     
     
       18. The lighting device of  claim 1 , wherein the heat sink comprises a first heat radiation part on which the light source module is disposed, and a second heat radiation part having the receiver,
 wherein the second heat radiation part of the heat sink comprises an inner portion having the receiver, and an outer portion enclosing the inner portion, and 
 wherein the first heat radiation part of the heat sink comprises an upper portion on which the substrate of the light source module is disposed, and a lower portion disposed between the inner portion of the second heat radiation part and the outer portion of the second heat radiation part. 
 
     
     
       19. The lighting device of  claim 1 , wherein the extended substrate is coplanar with the support plate.